Induced nuclear reactions: processes – systems – and elements – Fuel component structure – Plural fuel segments or elements
Patent
1994-11-15
1995-11-07
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
Fuel component structure
Plural fuel segments or elements
376446, 376353, 376449, 376441, 376436, G21C 330
Patent
active
054652820
ABSTRACT:
A fuel assembly for a nuclear reactor, comprising a number of parallel fuel rods which are retained by means of spacer grids, arranged along the fuel rods, as well as guide thimbles wherein the guide thimbles, are fixed to the spacer grids. The guide thimbles with associated fuel rods are further fixed between a top nozzle and a bottom nozzle. In the top nozzle, through-holes are arranged for connection to a top sleeve joined to the upper end of the respective guide thimble. In the top sleeve, a first locking element is arranged for cooperation with a second locking element arranged on a guide sleeve, which guide sleeve is insertable through that hole in the top nozzle which corresponds to the respective top sleeve. The locking elements are interlocked in connected position by means of a locking sleeve insertable into the guide sleeve. The locking sleeve comprises a third locking element in the form of a through-opening arranged in the wall, a corbelled-out portion being arranged in the edge of the opening. The opening imparts to the corbelled-out portion resilient properties. The corbelled-out portion is adapted, when the locking sleeve is inserted into the guide sleeve, to cooperate with a fourth locking element in the form of an annular slot arranged in the inner wall of the guide sleeve. (FIG. 2)
REFERENCES:
patent: 4064004 (1977-12-01), Long et al.
patent: 4342721 (1982-08-01), Pomie et al.
patent: 4684500 (1987-08-01), Gjertsen et al.
patent: 5147599 (1992-09-01), Mansson
ABB Atom AB
Chelliah Meena
Walsh Donald P.
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